linux-kernel - Re: [PATCH] remove the no longer needed pid_alive() check in __task_pid_nr

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Message-ID: <20200424180523.GD26802@redhat.com>
Date:   Fri, 24 Apr 2020 20:05:24 +0200
From:   Oleg Nesterov <oleg@...hat.com>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     linux-kernel@...r.kernel.org,
        Christof Meerwald <cmeerw@...erw.org>,
        Linux Containers <containers@...ts.linux-foundation.org>
Subject: Re: [PATCH] remove the no longer needed pid_alive() check in
 __task_pid_nr_ns()

On 04/21, Eric W. Biederman wrote:
>
> Oleg Nesterov <oleg@...hat.com> writes:
>
> > Starting from 2c4704756cab ("pids: Move the pgrp and session pid pointers
> > from task_struct to signal_struct") __task_pid_nr_ns() doesn't dereference
> > task->group_leader, we can remove the pid_alive() check.
> >
> > pid_nr_ns() has to check pid != NULL anyway, pid_alive() just adds the
> > unnecessary confusion.
> >
> > Signed-off-by: Oleg Nesterov <oleg@...hat.com>
> Reviewed-by: "Eric W. Biederman" <ebiederm@...ssion.com>

Thanks, can you take this patch?

Oleg.